Systems and methods for analyzing a physiological sensor signal
First Claim
1. A method for analyzing a detector signal of a physiological patient sensor, comprising:
- receiving the detector signal from the physiological patient sensor at a processor, wherein the detector signal crosses a horizontal boundary more than once;
using the processor, determining a relative time and a slope of the detector signal at each point at which the detector signal crosses the horizontal boundary;
using the processor, estimating an amplitude of the detector signal based, at least in part, on the determined relative time and slope of the detector signal at each point at which the detector signal crosses the horizontal boundary; and
using the processor, determining a physiological parameter of a patient based, at least in part, on the estimate of the amplitude of the detector signal.
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Abstract
The present disclosure relates generally to patient monitoring systems and, more particularly, to signal analysis for patient monitoring systems. In one embodiment, a method of analyzing a detector signal of a physiological patient sensor includes obtaining the detector signal from the physiological patient sensor, wherein the detector signal crosses a horizontal boundary more than once. The method also includes determining the relative time and the slope of the detector signal at each boundary crossing. The method further includes estimating the amplitude of the detector signal based, at least in part, on the determined relative time and slope of the detector signal at each boundary crossing. The method also includes determining a physiological parameter of a patient based, at least in part, on the estimate of the amplitude of the detector signal.
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Citations
13 Claims
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1. A method for analyzing a detector signal of a physiological patient sensor, comprising:
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receiving the detector signal from the physiological patient sensor at a processor, wherein the detector signal crosses a horizontal boundary more than once; using the processor, determining a relative time and a slope of the detector signal at each point at which the detector signal crosses the horizontal boundary; using the processor, estimating an amplitude of the detector signal based, at least in part, on the determined relative time and slope of the detector signal at each point at which the detector signal crosses the horizontal boundary; and using the processor, determining a physiological parameter of a patient based, at least in part, on the estimate of the amplitude of the detector signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A patient monitoring system, comprising:
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a patient monitor comprising; an input configured to receive a detector signal from a physiological sensor; and a processor configured to; locate a portion of the detector signal between two adjacent intersections of the detector signal and a horizontal axis; determine an amount of time between the two intersections of the detector signal and the horizontal axis; determine a gradient for the detector signal at the two intersections of the detector signal and the horizontal axis; and estimate the amplitude of the portion of the detector signal between the two intersections based, at least in part, on the determined amount of time between the two intersections and the determined gradients for the detector signal at the two intersections. - View Dependent Claims (11, 12, 13)
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Specification